Ultherapy uses ultrasound energy targeting the 4.5 mm SMAS layer, offering a...

https://louisssuperword.publishlane.com/posts/do-clinics-use-templates-for-ultherapy-or-map-your-anatomy-every-time

Ultherapy uses ultrasound energy targeting the 4.5 mm SMAS layer, offering a deeper lift compared to standard HIFU, which usually focuses on 1.5 to 3 mm depths. RF heats skin to around 40-45°C for collagen tightening but doesn’t reach the SMAS